October weather forecastYosemite National Park, CA

Weather in October

October in Yosemite National Park brings a noticeable dip in temperature, hinting at the approaching winter season. As the park transitions from fall to winter, a slight increase in rainfall to 1.9" (48mm) is observed from the previous month. Cooler temperatures pervade, and fewer hours of sunshine bathe the expansive parkland. This transition phase brings forth the breathtaking beauty of the park with color-splattered trees and a crisp air. The weekend visitors can relish longer hikes without the summer's heat or the winter's chill.

Temperature

The shift to October brings a decrease in the average high-temperature, falling from 83.5°F (28.6°C) in September to a still moderately hot 73.6°F (23.1°C). Despite the high peak temperatures, Yosemite National Park witnesses an average nighttime cooling to a wintry 38.3°F (3.5°C) in October.

Rainfall

In Yosemite National Park, during October, the rain falls for 4 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Yosemite National Park, during the entire year, the rain falls for 65 days and collects up to 36.26" (921mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, Yosemite National Park receives 0.2" (5mm) of snow. In Yosemite National Park, during the entire year, snow aggregates up to 65.31" (1659mm).

Daylight

In October, the average length of the day is 11h and 12min.
On the first day of the month, sunrise is at 6:54 am and sunset at 6:40 pm. On the last day of October, sunrise is at 7:23 am and sunset at 6:00 pm PDT.

Sunshine

In October, the average sunshine is 9h.

UV index

In Yosemite National Park, the average daily maximum UV index in October is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 5 in October translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.